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E- 4
List, or for De- listing) that is different from the current
status, but the status has not yet been adopted by the
Wildlife Resources Commission and by the General
Assembly as law. In the lists of rare species in this book,
these proposed statuses are listed in parentheses below
the current status. Only those proposed statuses that are
different from the current statuses are listed.
Federal Status Description3
E Endangered A taxon “ which is in danger of extinction throughout all or a
significant portion of its range” ( Endangered Species Act,
Section 3).
T Threatened A taxon “ which is likely to become an endangered species
within the foreseeable future throughout all or a significant
portion of its range” ( Endangered Species Act, Section 3).
EXN Endangered,
nonessential
experimental
population.
The Endangered Species Act permits the reintroduction of
endangered animals as " nonessential experimental"
populations. Such populations, considered nonessential to
the survival of the species, are managed with fewer
restrictions than populations listed as endangered.
T
( S/ A)
Threatened
due to
Similarity of
Appearance.
The Endangered Species Act authorizes the treatment of a
species ( subspecies or population segment) as threatened
even though it is not otherwise listed as threatened if: ( a)
The species so closely resembles in appearance a
threatened species that enforcement personnel would have
substantial difficulty in differentiating between the listed and
unlisted species; ( b) the effect of this substantial difficulty is
an additional threat to a threatened species; and ( c) such
treatment of an unlisted species will substantially facilitate
the enforcement and further the policy of the Act. The
American Alligator has this designation due to similarity of
appearance to other rare crocodilians. The Bog Turtle
( southern population) has this designation due to similarity
of appearance to Bog Turtles in the threatened northern
population.
C Candidate A taxon under consideration for which there is sufficient
information to support listing. This category was formerly
designated as a Candidate 1 ( C1) species.
3 These statuses are designated by the US Fish and Wildlife Service. Federally listed Endangered and
Threatened species are protected under the provisions of the Endangered Species Act of 1973, as
amended through the 100th Congress. Unless otherwise noted, definitions are taken from the Federal
Register, Vol. 56, No. 225, November 21, 1991 ( 50 CFR Part 17).

E- 4
List, or for De- listing) that is different from the current
status, but the status has not yet been adopted by the
Wildlife Resources Commission and by the General
Assembly as law. In the lists of rare species in this book,
these proposed statuses are listed in parentheses below
the current status. Only those proposed statuses that are
different from the current statuses are listed.
Federal Status Description3
E Endangered A taxon “ which is in danger of extinction throughout all or a
significant portion of its range” ( Endangered Species Act,
Section 3).
T Threatened A taxon “ which is likely to become an endangered species
within the foreseeable future throughout all or a significant
portion of its range” ( Endangered Species Act, Section 3).
EXN Endangered,
nonessential
experimental
population.
The Endangered Species Act permits the reintroduction of
endangered animals as " nonessential experimental"
populations. Such populations, considered nonessential to
the survival of the species, are managed with fewer
restrictions than populations listed as endangered.
T
( S/ A)
Threatened
due to
Similarity of
Appearance.
The Endangered Species Act authorizes the treatment of a
species ( subspecies or population segment) as threatened
even though it is not otherwise listed as threatened if: ( a)
The species so closely resembles in appearance a
threatened species that enforcement personnel would have
substantial difficulty in differentiating between the listed and
unlisted species; ( b) the effect of this substantial difficulty is
an additional threat to a threatened species; and ( c) such
treatment of an unlisted species will substantially facilitate
the enforcement and further the policy of the Act. The
American Alligator has this designation due to similarity of
appearance to other rare crocodilians. The Bog Turtle
( southern population) has this designation due to similarity
of appearance to Bog Turtles in the threatened northern
population.
C Candidate A taxon under consideration for which there is sufficient
information to support listing. This category was formerly
designated as a Candidate 1 ( C1) species.
3 These statuses are designated by the US Fish and Wildlife Service. Federally listed Endangered and
Threatened species are protected under the provisions of the Endangered Species Act of 1973, as
amended through the 100th Congress. Unless otherwise noted, definitions are taken from the Federal
Register, Vol. 56, No. 225, November 21, 1991 ( 50 CFR Part 17).